Mac, Charlie and Dennis come up with another poorly thought out get rich quick scheme by trying to start a door to door gas selling firm. After getting a loan from the bank, they plan on buying a mass quantity of gasoline, waiting for the price to go up, and selling it for profit later on. The gang believes that when the gas prices reach a certain point they would be able to undercut the gas companies and sell the product at a higher price than what they bought it for.